Features 1、Automatic detection of zener diode 0.0130v. 2、Self-test with automatic calibration. 3、Support infrared coding. 4、Infrared waveform display. 5、Infrared receiving instructions. Specification Features: Automatic detection of zener diode 0.0130v. Self-test with automatic calibration. Support infrared coding. Infrared waveform display. Infrared receiving instructions. The measurement results are displayed by TFT graphic. A key operation. Automatic shutdown (timeout setting). Built-in high capacity rechargeable lithium ion battery. Specification: Main color: blue Scanning range: 0.1MHz Display: 160 x 128TFT Battery: 1 x lithium ion battery, 3.7v, 300mA Weight: Approx.115g/4.1oz Package list: 1 x Transistor tester 1 x USB cable. 1 x Red and yellow green contact wires. 3 x contact pins 2 x capacitance Package List